Lesson 10.4 - Basic rhythm of the heart Flashcards
1
Q
How is the sound of the heartbeat heard?
A
Stethoscope
2
Q
Why does the heart make a sound?
A
Closing of heart valves
3
Q
How is the sound of the heart valves described?
A
lub-dub
4
Q
First sound that comes from the heart?
A
Blood is forced against atrioventricular valves as the ventricles contract.
5
Q
Second sound that comes from the heart?
A
Backflow of blood closes the semilunar valves in the aorta and pulmonary artery as the ventricles relax.
